Improvement in machines for forming pans



E. KUESSNER. Machines for Forming Pans.

No'.r45,650, R- Parented mm1-6,1873.

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EDWARD' KUEssNEE, or CINCINNATI, onio.

IMPROVEMENT IN MACHINES FORAFORMING PANS.

Specification forming part of Letters Patent No. 145,660, dated December 16,1873; application filed October 13, 1873.

To all whom 'it may concern:

Be it known that I, EDWARD KUEssNER, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Machine for Forming Sheet-Metal Pans, of which the following is a description The present invention is an improvement on those sheet-metal-bending apparatus which have for their object the formation of what are known as square pans for baking purposes and in which the sheet or blank to be bent, having been inserted'in the machine, is firmly clamped between two jaws, of which the upper one constitutes the die or form for the inside of the pan; and said sheet has its edges thus bent up ward with ease, accuracy, and dispatch, so as to be in it condition for the final operations of beating down and wiring. My invention has reference to devices whereby such forming operation is made applicable to any form or dimension of square pan.

Figure lis a longitudinal section of a machine embodying my invention, the machine being in its open condition. Fig. 2 is a transverse section, showing a blank confined in the machine, and in the act of being pressed. Fig. 3 is a horizontal section of the machine at line 1 l, Fig. 4 in a transverse section at the line 2 2. Fig. 5 is a longitudinal section at the line 3 3. Fig. Gis a longitudinal section at the line 4 4. Fig. 7 is a plan of one of the blanks before being bent; and Fig. 8 is a perspective view of one of the blanks after being bent up.

Elevated a convenient distance from the floor, upon a stand, A, is a bed-plate, B, preferably of cast iron. Erected on the bedplate B is a gallowsframe, C, having a central nut', D, for the screw-stem E of the clamp-die or inner form F, which serves to hold down the blank, and whose edges fand corner flanges f' form abutments which support the sheet against the pressure of the outside formers G, the same being metallic plates of the represented trapezoidal form, and being adjustably connected to leaves K, which latter are hinged at h to rests or supporting-plates H. These rests or supports are secured to the bed by bolts l, whose heads are countersunk in said rests, and traverse slots b in bed-plate B, to which they are secured by nuts I underneath said plate. The plates G are the members of the machine which serve to bend the sheet metal up against the inclined surfaces f j" of the die F, and said plate is notched at g to receive bolts J wherewith the plate is united to the leaf K, previously alluded to.

By simply unslacking the bolts J, the forining-plates G can be adjusted upon the leaf K, or unshipped at will, thus enabling formers of different sizes to be substituted.

By this arrangement a single machine is rendered capable of producing pans of any desired size, it being understood, however, that a special die, F, must be used for pans of different dimensions.

Two contiguous formers are provided with adjustable beads or gages L, against which the edge of the blank is placed for clamping.

It will be seen that the parts F, G, H, K, and L, being all adjustable and separable, enable the machine to be set for any size or form of square pan withinthe range of its slots.

Depending from the rests H are lugs or ful crum-bearings M of four levers, N, whose upturned extremities n bear against the under sides ofthe leaves K. These levers N are connected, by adjustable suspenders O, with stirrup P, that receives the end of a treadle, Q.

The operation of the apparatus is as follows: A die, F, of proper size and shape, having' been secured to screw-stem E, and the rests H and formers G and gages L having been properly adjusted in their respective places, and die F being in its elevated, and the formers G in their depressed, conditions, a blank is so inserted that its edge will bear against the gages L. The die F is now brought down, by means of hand-Wheel R, on screw-stem E, so as to secure the blank. The operator n ow depresses the treadle Q, so as to elevate, simultaneously, the four formers G, and, by so doing, to bend up the four sides ofthe pan, and produce the form represented at Fig. 8. The pan, having been thus accurately brought to form, can be finished at leisure, or be nested and shipped in this condition for the use of the trade.

If it shouldbe desired to produce a pan larger than is shown in the drawings, the die F must be detached from the clamping-screw E, and another die, corresponding to the required size of pan, substituted for it. The hinged members H h K are then shifted outwardly a suitble distance, and secured in their new position by the bolts I I', after which larger formers are substituted for the ones G. After these changes have been e'ected, the Suspenders O are let out a sufficient distance to compensate for the shifting of the fulcrums of the actuating-levers N. A larger-sized blank is then inserted in the machine, and the production of pans proceeded with as previously described.

' To manufacture pans of less size than is shown in the drawings, a correspondinglysmall die must be applied to the machine, and the hinged members H h K be shifted toward the center of the bed-plate, and shorter formers, Gr, are secured to said hingedmembers. The suspenders O are then shortened, so as compensate for the approach of the fulcrums M toward each other, and the machine is at once ready for operating upon smaller blanks, which are then. clamped and bent, as previously stated.

It will be readily understood that the compensating links or suspenders O, by being ad` justable relatively to the shiftable plates H, and their hinged forming devices K G, which devices are also relatively adjustable, whether arranged for large or small sized pans, or for pans of any intermediate dimensions, are members which cannot be dispensed with in my machine, as they enable it to be operated with the greatest facility, and without loss of power, for any desired size; neither is it necessary to substitute different lengths of bent levers N n for the various sizes of pans.

I claim as new and of my invention- In a machine for forming sheet-metal pans, the bed-plate B, removable formers G, gages L, adjustable supporting -plates H, hinged leaves h K, fulcrums M, bent levers N n, adjustable compensating Suspenders O, and lever Q, all combined and operating substantially as herein set forth.

In testimony of which invention I hereunto set my hand.

EDWARD KUESSNER.

Attest:

Gno. H. KNIGHT, J. E. SrnvnNsoN. 

